16616205101 has 4 divisors (see below), whose sum is σ = 16618695900. Its totient is φ = 16613714304.

The previous prime is 16616205083. The next prime is 16616205149. The reversal of 16616205101 is 10150261661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9454645225 + 7161559876 = 97235^2 + 84626^2 .

It is a cyclic number.

It is not a de Polignac number, because 16616205101 - 2²⁶ = 16549096237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616205601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235366 + ... + 1248743.

It is an arithmetic number, because the mean of its divisors is an integer number (4154673975).

Almost surely, 2^16616205101 is an apocalyptic number.

It is an amenable number.

16616205101 is a deficient number, since it is larger than the sum of its proper divisors (2490799).

16616205101 is an equidigital number, since it uses as much as digits as its factorization.

16616205101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490798.

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 16616205101 its reverse (10150261661), we get a palindrome (26766466762).

The spelling of 16616205101 in words is "sixteen billion, six hundred sixteen million, two hundred five thousand, one hundred one".